Not all of them, by no means anywhere close to all of them, just the most notable blockheads among them — three altogether, two freshmen and one sophomore, all of whom were among the first to be expelled the next day — masturbated into pairs of stolen panties...

He is a classic sideshow performer, entertaining crowds with feats such as sword swallowing, fire-eating, and chainsaw juggling. His specialty, however, is the human blockhead act, hammering six-inch nails up his nostrils.

Burkhardt was a legendary figure in the sideshow world, a mentor and instructor to a new generation of blockheads and other working acts who now train in private classes at Coney Island USA's Sideshow School with Burkhardt's disciple Todd Robbins (Zigun 2006).

Two years' blockading made fair Malta ours: A noble struggle! -- yet 't is thought (at Rading) That Britain's island shews superior pow'rs, To bear, and to survive, two years blockheading !

1856, John Adams, The works of John Adams, second President of the United States, →ISBN:

I have blockheading and boxing enough at Master Lovell's, I won't have it repeated here; and in a great passion, I threw the Virgil at his head, hit him in the face, and bruised his lip, and ran away.

1958, The Ethical Outlook: A Journal of the American Ethical Union:

The operation of blockheading is much the same as that of beheading, which Charles I underwent. In both the head is severed from the body. The body goes around without benefit of head. The victim becomes a Headless Horseman, or that more common figure a Headless Pedestrian. In our day the operation is often done not on an executioner's block but on Paradise Avenue in Suburbia Manor.